• Female plants produce tiny white flowers that float on the surface; male plants produce tiny green-white flowers that break loose and float.
  • Stems are submersed and slender
  • Leaves in whorls of 3 – 10 around the stem with rough edges
  • Length up to 25 feet

Weed Pictures

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Weed Information

ControlDrawdown of water levels, mechanical harvestors, biological and aquatic herbicide. Contact your County Weed District or local Applicator for more information.
HabitatSprings, lakes, ponds, marshes, ditches and rivers.
RootExtensive root system.
Leaf ShapeSmall, lance-shaped with pointed tips.
LifespanPerennial; two years or longer.
Priority 3 WeedNot a noxious weed, but a regulated plant; potential for significant negative economic and ecological impacts.
Similar Looking PlantsBrazilian waterweed and Elodea.
Important InformationMainly reproduces and spreads by fragments; roots dormant and viable in the soil for up to eight years.